Monochrome Worlds

Monochrome Worlds is a simple puzzle game where players must help two people
reach a common goal. These two people, one of them black and the other white,
live in different worlds and must work together in order that both of them
reach the gray-colored spot, which is the only place where they can share the
same space.

In order to help the other, each character can toggle some of the game’s blocks
from one world to the other and back again. This can lead to some interesting
situations where a character must remove a block from the other’s world in
order to let her companion pass through.

It is a remake of a Flash-based game called
Monochro Observer
created by Tatsuya Koyama. The motivation behind the remake was to be able to
play the game in environments that have no Flash players available, such as the
GP2X.

This game is known to work on GNU/Linux, Mac OS X, and Microsoft Windows
platforms.